Improvement in grain-separators



GSheets-Sheetl. H. A. BARNARD.

GRAIN-SEPARA'I'OR. 79 z54 Pmenned. June 27,1876.

NPETERS, PHOTULITHOGRAPHER WASHINGTON D C 3 Sheets-Sheet 3. H. A. BARNARD.

GRAIN-SEPARATOR. N 179,Z54, Patented June 27,1876.

WITNESSES INVEJV'TOR 46,6m-Q 6 0&7 I (2.45M 'ifin/v moew .dttarney N.PETERS. FHDTO-UTNOGRAPHER, WASHINGTON. D C.

UNITED STATES HEMAN A. BARNARD, OF MOLINE, ILLINOIS, ASSIGNOR TO BARNARD-AND LEAS MANUFACTURING COMPANY, OF SAME PLACE.

IMPROVEMENT IN GRAlN-SEPA RATORS.

Specification forming part of Letters Patent No. 179,254, dated J une 27, 1876; application filed March 11,1876.

- ings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to grain-separators;

and it consists in the construction and arrangement of the parts of the same, as will be hereinafter more fully set forth.

In the annexed drawings, Figure 1 is a side elevation of a grain separator embodying my invention. Fig. 2 is a transverse vertical section, and Fig. 3 a longitudinal vertical section, of the same.

A represents the frame of the machine, in the bottom part'of which is the shoe B, containing the screens 0 0, said shoe being operated by eccentrics I) on a shaft, a. D is the fan-case, with fan E, and G the screeningschamber, on one side of the fan. H is the airtrunk, along the side of the screenings-cha1nber G, these parts being all constructed and arranged in any of-the known and usual ways.

Above the upper screen, in the rear part of the machine, is formed a wide air-trunk, I, communicating, through a passage, 1, with another screenings-chamber, G, on that side of the fan. On the rear side of the air-trunk I is formed the hopper J, of the same width as the air-trunk, and communicating therewith at the lower end.

The hopper J is provided with a perpendie nlar slide, L, open ted by racks d and pinions 6 on a shaft,f, whe eby the feed can be regulated so as to admit t e grain in any desired quantity, and always in a wide thin sheet. The slide-L is held at any point desired by compressing the sides of the hopper by a rod, h, and thumb-nut i thereon.

Underneath the slide L is a rotating shaft, m, over which the grain passes into the airtrunk I. This shaft, by its rotation, feeds and spreads the grain so that it enters the airtrunk in a thin Wide sheet, giving the air better chance to act 011 the grain, and separate all impurities therefrom.

The screenings are carried up through the air-trunk I and the passage 1 into the chamber G, where they settle, while the lighter particles are carried out through the fan.

1n the bottom of the chamber G is a selfclosing valve, o, to retain the screenings until a sufficient quantity has accumulated, so that the weight thereof overcomes the pressure of air on the outside, when the valve opens and discharges the same. The valve immediately closes again, and prevents any air from pass ing up through the chamber.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters'Patent, is-

The combination, with the shoe containing the screens 0 O, of the fan E, the two screenings-chambers G G, vertical air-trunks I 11, connected by passages with the screeningschambe-rs, the hopper J, and slide L, all substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

HEMAN A. BARNARD.

Witnesses:

ELsWoRTH MAPES, J. SILAs LEAS. 

